The Bushing,sleeve, cataloged under National Stock Number 3120-01-256-9773, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3120-01-256-9773 |
| Primary Part Number | 4M139BC14-043 |
| Item Name | Bushing,sleeve |
| FSC / FSG | 3120 / 31 — Bearings, Plain, Unmounted |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Flange Outside Diameter | 1.2400 INCHES MINIMUM AND 1.2600 INCHES MAXIMUM IN |
| Body Outside Diameter | 1.0648 INCHES MINIMUM AND 1.0658 INCHES MAXIMUM IN |
| Body Inside Diameter | 0.8685 INCHES MINIMUM AND 0.8700 INCHES MAXIMUM IN |
| Flange Width | 0.0600 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM IN |
| Material | COPPER ALLOY 172 AND COPPER ALLOY 173 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4M139BC14-043 PRIMARY | The Boeing Company Div Defense (USA) |
| 4M139BC14-043 | Mayday Manufacturing Co. (USA) |
| 4M139BC14-043 | Reid Products Inc. Dba Reid Products Inc (USA) |
| 4M139BC14-043 | Avalon Machine Products Inc (USA) |
| 4M139BC14-043 | All Power Manufacturing Co. (USA) |
| Reference | Meaning |
|---|---|
| 4M139BC14-43 | C/1 Advisory reference — outside the item-of-supply concept Avalon Machine Products Inc |
| 4M139BC14-43 | 5/2 Secondary reference U.S. Government activity |
| 4M139BC14-043 | 5/2 Secondary reference U.S. Government activity |
NSN 3120-01-256-9773 is a Bushing,sleeve, manufactured by The Boeing Company Div Defense, classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.
NSN 3120-01-256-9773 has 5 manufacturer part numbers on file: 4M139BC14-043 (The Boeing Company Div Defense), 4M139BC14-043 (Mayday Manufacturing Co.), 4M139BC14-043 (Reid Products Inc. Dba Reid Products Inc), 4M139BC14-043 (Avalon Machine Products Inc), 4M139BC14-043 (All Power Manufacturing Co.).
Key specifications for 4M139BC14-043: Flange Outside Diameter: 1.2400 INCHES MINIMUM AND 1.2600 INCHES MAXIMUM IN; Body Outside Diameter: 1.0648 INCHES MINIMUM AND 1.0658 INCHES MAXIMUM IN; Overall Length: 0.4920 INCHES NOMINAL IN; Body Inside Diameter: 0.8685 INCHES MINIMUM AND 0.8700 INCHES MAXIMUM IN. 5 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.